Smith—Monograph of Scenedesmus . 
431 
p. 91; PL VIII. Honigmann, 1909, p. 54. Schmula, 1910, p. 86. 
Comere, 1911, p. 49. Petersen, 1911, p. 160; Fig. 5. Andressen, 
1913, Smith, 1914A, p. 283; PL XVI, Figs. 1-23. Smith, 1914B, 
p. 1185; Pl. LXXXVII and LXXXVIII. 
S. pedinatus. Meyen, 1829, p. 775; PL XLIII, Figs. 33-35. 
Kiitzing, 1833, p. 608. de Brebisson, 1839, p. 271. Meneghini, 
1840, p. 208. Balsamo, 1900, p. 266. 
Scenodesmus acutus. Ehrenberg, 1834, p. 310. Kiitzing, 1845, 
p. 139. Kiitzing, 1849, p. 186. Nageli, 1849, p. 92; PL V, 
Figs. 5A-5G. Rabenhorst, 1850, p. 157. de Brebisson, 1856, p. 
160. Archer, 1861, p. 753. Kirchner, 1891, p. 18. Brunnthaler, 
1900, p. 310. Conn and Webster, 1908, p. 35; PL VI, Fig. 37. 
Arthrodesmus acutus var. obtusior. Ehrenberg, 1836. 
S. fusiformis. Meneghini, 1837, p. 18. Meneghini, 1840, p. 
208. 
S. triseriatus. Meneghini, 1837, p. 18. Meneghini, 1840, p. 
208. de Brebisson, 1839, p. 271. Ralfs, 1845, p. 403; PL XII, 
Fig. 7. Ralfs, 1846, p. 151; PL XV, Fig. 7. Balsamo, 1900, p. 267. 
Arthrodesmus acutus. Ehrenberg, 1838, p. 151; PL X, Fig. 19. 
Ehrenberg, 1843, p. 338. Pritchard, 1841, p. 190. 
Arthrodesmus pedinatus. Ehrenberg, 1838, p. 151; PL X, Fig. 
17. Pritchard, 1841, p. 190. Pokorny, 1854, p. 58. 
S. acutus var. fusiformis. de Brebisson, 1839, p. 271. 
Scenodesmus pedinatus. Kiitzing, 1843, p. 164. Kiitzing, 1845 
p. 140 de Brebisson, 1856, p. 159. 
Scenodesmus acutus var. biseriatus. Kiitzing, 1849, p. 186. 
Scenodesmus dimorphus var. pedinatus. Kiitzing, 1849, p. 186. 
Scenodesmus acutus var. fusiformis. Kiitzing, 1849, p. 186. 
Scenodesmus acutus var. obliquus. Kiitzing, 1849, p. 186. 
Arthrodesmus pedinatus var. acutus. Pokorny, 1854, p. 58. 
Scenodesmus obliquus. de Brebisson, 1856, p. 156. 
£. acutus var. obliquus. Rabenhorst, 1868, p. 64. W. West, 
1883, p. 105. Cooke, 1882, p. 33. Cooke, 1885, de Wildemann, 
1885, p. 123. Parfitt, 1886, P. 392. W. West, 1889A, p. 290. W. 
West, 1889B, p. 206. W. West, 1890, p. 298. W. West, 1891B, 
p. 421. W. West, 1892A, p. 194. W. West, 1892B, p. 738. Borge, 
1894, p. 9. Fritsch, 1902, p. 582. Fritsch, 1903, p. 646. W. 
West, 1903, p. 100. Fritsch, 1905, p. 164. Fritsch, 1906, p. 205. 
S. obliquus forma alternans. Huber, 1908, p. 313. 
S. obliquus forma parvus. Bernard, 1908, p. 181; PL XIV, Figs. 
407-416, 414', 415', 416', Bernard, 1909, p. 76; Pl. VI; Figs. 
160-161. 
“Coenobiis 4-8 cellularibus; cellulis fusifoideis, utroque 
polo acute plerumque in seriem simplicem dispositis. Dimens, 
cell. 5-27 x 3-9 
S. obliquus has been isolated several times from various 
localities in this vicinty. The species has been studied in 
7 
